Never one to leave without having the last word, Fox News pundit (and right wing attack labradoodle) Bill O’Reilly is set to make a third appearance on CBS’s “Late Show with David Letterman” on Oct. 27 to promote his new book “Culture Warrior.”

I don’t remember the first time he was on, but when O’Reilly sat down with Letterman in January, the late night host ripped him a new one. Chastising O’Reilly for relentlessly pummeling Cindy Sheehan, the mother to a soldier killed in a Iraq who has turned into the symbol of the anti-war movement, Letterman famously told O’Reilly, “I have the feeling about 60 percent of what you say is crap.”

Letterman’s was a conservative estimate, but OK. Anyway, I’m not sure what I’ll relish more — that appearance, or the subsequent analysis.

Which reminds me — “The Colbert Report” turned one last night, as fans know, but thinking about all the Colbert Nation’s leader has accomplished within a single year is a humbling experience. A partial recap includes:

–Had viewers flood a website with votes to get a Hungarian bridge named after him. Ultimately the honor was revoked because in order to have a bridge named after a person in Hungary, the honoree must speak Hungarian. A little time in a Berlitz class can fix that, right?. But there was another tiny detail — the honoree has to be dead. A steep price for a bridge, don’t you agree?

–Inspired the San Francisco Zoo to name a baby bald eagle after him, Stephen Jr. Li’l Steven grew up, and via a tracking device, was discovered to have flown to Canada, much to Colbert’s dismay.

–Had the mascot of the Saginaw Spirit, an OHL Junior hockey team, named “Steagle” in his honor.

–Shredded White House policy, and the president, as the featured speaker at the White House Correspondents Association dinner.

And now? He’s auctioning off the portrait of himself hanging above the set’s mantle (which displays him standing in front of another portrait of himself) on eBay. All proceeds from the sale will go to Save the Children; as of this posting, the bidding was up to $3,250. Replacing the painting is another portrait, which depicts Colbert standing in front of the other portrait.

Happy first anniversary, Colbert Nation. Here’s wishing you many more.